Drill-holder.



No. 688,094. Patented Doc. 3, l9 0l.

E. P. JONES.

DRILL HOLDER.

cation mad Jan. 30, 1900 W/ TNE SSE 8 ITED STATES PATENT OFFICE.

EDWARD P. JONES, OF BRECKENRIDGE, COLORADO.

DRILL-HOLDER.

SPECIFICATION forming part of Letters iPatent No. 688,094, datedDecember 3, 1901. Application filed January 30, 1900. Serial No. 3,334.(No model.)

To all whont it may concern:

Be it known that I, EDWARD P. J ONES, a citizen of the United States,and a resident of Breckenridge, in the county of Summit and State ofColorado, have invented a new and Improved Drill-Holder, of which thefollowing is a full, clear, and exact description.

The purpose of this invention is to provide means for adjustably holdinga rock-drill, the device permitting the drill to be placed in anyposition that may be desired with respect to the column.

This specification is the disclosure of one form of the invention, whilethe claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, formingapartof thisspecification, in which similar characters of reference indi- 'catecorresponding parts in both views.

Figure 1 is a perspective view of the invention, and Fig. 2 is a viewwith parts in section.

A clampa of any desired construction is provided for engagement with thecolumn or a part thereof, on which column the drill is supported,as willbe understood. This clamp is formed with a portion a in the shape of afrustum of a cone and adapted to set into a corresponding cavity 19,formed in the holder 1). A bolt a is fastened to the clamp to axiallycoincident with the portion a thereof, and this bolt extends through theholderb and is fitted with a nut for securing it. Byloosening the nutthe holder b may be freely adjusted around the axis of the portion a ofthe clamp to place the holder in any position desired. When the nut istightened, the parts a and b are held rigidly together.

The holder b has a recess 11 formed therein at the end opposite theclamp a, and a jaw c is hingedly mounted on such end of the holder Thisjaw has a recess 0' formed therein, which corresponds with the recess 12such recesses forming a spherical socket when the parts are in theposition shown in the drawings. For holding the jaw c in closed positionI provide a hook c pivoted on the jaw c and working with a headed pin bon the holder. This hook 0 serves to hold the jaw loosely in position,and when it is desired to draw the jaw up into tightened position thenut cl of the bolt d is tightened, such bolt passing through the jaw cand a portion of the holder 12. This draws the jaw forcibly against theholder. The shell 6 of the drill, on which the drill is adjustablymounted to slide in the usual manner, is provided with a stout arm 6',terminating in a spherical enlargement or ball e which is received inthe cavities b and c. When the boltd is loosened and the hook c engagedwith the pin 6 the ball 6 maybe turned freely in the socket to adjustthe drill; but when the bolt d is tightened the jaw 0 will be forcedagainst the ball 6 and the slide 6 will be held rigid with the holderZ). This arrangement of the ball and socket enables the drill to beplaced at any desired angle with respect to the horizontal position, andtaking this adjustment with the adjustment afforded by the movement ofthe holder 1) on the clamp a it will be seen that any adjustmentdesirable in the operation of a rock-drill may be attained.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A drill-holder, comprising a clamp, one member ofwhich is formed with a frusto-conieal projection, a bolt attached tosaid member centrally with respect to said projection, a holder properthrough which the bolt is passed, the holder proper being adjustable onthe bolt, ajaw hingedly mounted on the holder proper and having a cavitytherein matching with a corresponding cavity in the holder proper, alatch serving to hold the jaw in closed position, and an arm having aspherical enlargement or ball thereon, the enlargement or ball beingadjustably held in the cavities of the jaw and holder proper, and thearm having connect-ion with the drill.

2. Adrill-holder,comprisingaclampadapted to engage the column orsnpport,a holder proper mounted to turn on the clamp, means for locking theholder stationary on the clamp, a movable jaw mounted on the holderproper and having a cavity therein registering with a cavity in theholder, to form a socket, means for holding the jaw in closed position,and an arm having connection with the drill and formed with a sphericalenlargement or ball fitted and held in the said socket.

3. Adrill-holder,comprisingaclamp adapted to engage a support, a holderproper having one end mounted to turn on the clamp and provided at itsother end with a recess, l said jaw against the ball, as and for thepurmeans for locking the holder stationary on pose set forth.

the clamp, a hinged jaw on the recessed end In testimony whereof I havesigned my of the holder proper and provided with a rename to thisspecification in the presence of 5 cess corresponding with the recess ofsaid two subscribing witnesses.

holder and forming therewith a socket, a drillcarrier provided with anarm terminating in EDWVARD JONES a spherical enlargement or ball fittingin the l Witnesses:

said socket, and means for locking the free J. W. SWISHER, 10 end of thejaw to the holder and forcing the S. D. SWISHER.

